To eliminate a travelling position variation of an ink ribbon caused upon drive of hammer pins, prevent insufficiently printed characters generated due to travelling position variation of the ink ribbon, and prevent a reduction in execution printing speed.
A ribbon guide defining the travelling position of the ink ribbon is provided with a roller-shaped ribbon travelling position sensor and a drum-shaped roller which corrects the ribbon travelling position. The inclination angle of the ribbon guide can be changed by a stepping motor and an eccentric cum. When the inclination angle of the ribbon guide is changed according to a ribbon travelling position sensor signal, printing density information, and paper feeding information, the travelling position of the ink ribbon can be automatically adjusted. Thus, the problem can be solved.
WATABIKI SHINICHI
SHIRAKI JUNICHI
